| bytes | Package bytes implements functions for the manipulation of byte slices. |
| compress/flate | Package flate implements the DEFLATE compressed data format, described in RFC 1951. |
| compress/gzip | Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| io | Package io provides basic interfaces to I/O primitives. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| net/http | Package http provides HTTP client and server implementations. |
| net/http/httputil | Package httputil provides HTTP utility functions, complementing the more common ones in the net/http package. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |